Day: October 21, 2020

130049-82-0, Adding a certain compound to certain chemical reactions, such as: 130049-82-0, 3-(2-Chloroethyl)-6,7,8,9-tetrahydro-9-hydroxy-2-methyl-4H-pyrido[1,2-a]pyrimidine-4-one, can increase the reaction rate and produce products with better performance than those obtained under traditional synthetic methods. Here is a downstream synthesis route of the compound, 130049-82-0, blongs to pyrimidines compound.

79 g of 6-Fluoro-3-(4- piperidinyl)-l,2-benzisoxazole hydrochloride, 375 ml of methanol, and 78.2 g of triethyl amine were charged in a reaction vessel at 25-300C. The reaction mixture was stirred for 5 minutes. 75 g of the compound of formula II and 375 ml methanol were added to the above mass. The reaction mixture was heated to 60-630C and then maintained at 60-630C to achieve the desired conversion. The reaction mixture was then cooled to 40-450C. Methanol was distilled off under reduced pressure up to two volumes. 375 ml of water was added to the reaction mixture and stirred for 20-30 minutes at 25-300C. The solid was filtered and washed twice with 150 ml water followed by 2×150 ml acetone to obtain 87 g crude paliperidone. (Purity of compound of formula I >97%).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,130049-82-0, its application will become more common.

Reference:
Patent; WATSON PHARMA PRIVATE LIMITED; WO2009/116071; (2009); A2;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

109-12-6, The major producers of chemicals have been the Europe, Japan and China. Due to the growing call for a cleaner, greener environment, people will have to find innovative ways to maintain their relevance. Here is a compound 109-12-6, name is Pyrimidin-2-amine. This compound has unique chemical properties. The synthetic route is as follows.

A 5 L three-necked round bottom flask was charged with 2-aminopyrimidine (285.30 g, 3 mol), N-bromosuccinimide (1.17 kg, 6.6 mol), acetonitrile 2 L and methanol 1 L. The mixture in the reaction flask was stirred at 70 C for 6 hours. TLC and HPLC confirmed the reaction was complete. After the reaction was completed, the solvent was removed by rotary evaporation to give the crude product. The crude product was concentrated by evaporation and recrystallized to give the pure product 2-amino-5-bromopyrimidine. After drying, the yield was 90.48% and the purity was 99.05% (HPLC).

While traditionally a conservative industry, chemical producers will need to modernize their PR strategies to stay relevant.we look forward to future research findings about 109-12-6, Pyrimidin-2-amine.

Reference:
Patent; Shandong Youbang Biochemical Technology Co., Ltd.; Geng Xuanping; Zhang Xianglong; Cheng Wei; Lai Xinsheng; Lai Chao; Lai Ziteng; (4 pag.)CN106632079; (2017); A;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Each compound has different characteristics, and only by selecting the characteristics of the compound suitable for a specific situation can the compound be applied on a large scale. 109-12-6, name is Pyrimidin-2-amine. This compound has unique chemical properties. The synthetic route is as follows. 109-12-6

The 2-aminopyrimidine (2.5g, 26.29mmol) was dissolved in acetonitrile (25mL) was added N- bromosuccinimide (4.6g, 27.9mmol) under ice-cooling, stirred in the dark overnight at room temperature. Recovery of the solvent under reduced pressure, washed with water (100 mL) was washed, filtered off with suction, and dried in vacuo to give a white solid. Yield: 97%

If you are interested in these compounds, you can also browse my other articles.Thank you for taking the time to read this article. I hope you enjoyed it, 109-12-6, Pyrimidin-2-amine.

Reference:
Patent; Zhejiang University; Shanghai Institute of Materia Medica, Chinese Academy of Sciences; Liu, Tao; Li, Jia; Hu, Yongzhou; Gao, Anhui; Dong, Xiaowu; Zhou, Yubo; Song, Pinrao; Tong, Lexian; (59 pag.)CN106588884; (2017); A;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

The common heterocyclic compound, 147118-40-9, name is Rosuvastatin methyl ester, molecular formula is C23H30FN3O6S, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc., below Introduce a new synthetic route. 147118-40-9

Example 3 Methyl (E)-(6-[2-[4-(4-fluorophenyl)-6-isopropyl-2-[methyl-(methylsulfonyl)ainino]- rhoyrimidin-5-yl]vmyl](4i?,65)-2,2-dimethyl-[l,3]dioxan-4-yl)-acetate IX; Methyl ester IX (1.07 g) was dissolved in acetone (5.5 ml) and dimethoxypropane (5.5 ml). P- toluenesulfonic acid (0.1 g) was then added, and the mixture was stirred at room temperature for 1.5 hours. Then, alkalization with triethylamine (0.12 ml) was carried out, and the solution was evaporated. After adding ethyl acetate (60 ml), the mixture was shaken with water (2 x 8 ml). The organic layer was dried with Na2SO4 and evaporated. The crude product was crystallized from isopropyl alcohol. 0.88 g of white crystals of acetonide IX was obtained, which were recrystallized from isopropyl alcohol.1H NMR (CDCl3) delta: 7.62 (m, 2H); 7.08 (m, 2H); 6.52 (dd, IH, //=16.21, /2=1.30); 5.45 (dd, IH, //=16.23, J2=5.36); 4.45 (m, IH); 4.35 (m, IH); 3.70 (s, 3H); 3.56 (s, 3H); 3.51 (s, 3H); 3.37 (sept, IH, /=6.68); 2.56 (dd, IH, //=15.68, J2=6.71); 2.38 (dd, IH, //=15.69, /2=6.39); 1.49 (s, 3H); 1.40 (s, 3H); 1.68 (m, IH); 1.27 (d, 3H, J=6.69); 1.23 (d, 3H, J=6.66).

The synthetic route of 147118-40-9 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; ZENTIVA, a.s.; WO2007/121; (2007); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

703-95-7, Adding a certain compound to certain chemical reactions, such as: 703-95-7, 5-Fluoro-2,6-dioxo-1,2,3,6-tetrahydropyrimidine-4-carboxylic acid, can increase the reaction rate and produce products with better performance than those obtained under traditional synthetic methods. Here is a downstream synthesis route of the compound, 703-95-7, blongs to pyrimidines compound.

General procedure: To an ice-cooled solution of amine (1.0 mmol) in DMF were added Boc-AA-OH or carboxylic acid (1.0 mmol), followed by EDC*HCl (1.2 mmol), HOBt*H2O (1.2 mmol) and Et3N (1.2 mmol) were then added. The reaction mixture was stirred for 12 h at room temperature. After removal of the solvent in vacuo, the residue was dissolved in EtOAc (20 mL), extracted with 10% citric acid (aq) (3 ¡Á 5 mL), saturated solution of NaHCO3 (aq) (3 ¡Á 5 mL), and finally washed with brine (1 ¡Á 5 mL), then dried over Na2SO4, and finally evaporated to give the crude product which was further purified by using column chromatography and then subjected to tert-butyloxycarbamate deprotection by using general procedure A. The obtained product was then subjected to the next step or purified by using preparative HPLC in the case of target compounds. Purified target compounds were immediately lyophilized to afford their respective amorphous powders.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,703-95-7, its application will become more common.

Reference:
Article; Tagad, Harichandra D.; Hamada, Yoshio; Nguyen, Jeffrey-Tri; Hidaka, Koushi; Hamada, Takashi; Sohma, Youhei; Kimura, Tooru; Kiso, Yoshiaki; Bioorganic and Medicinal Chemistry; vol. 19; 17; (2011); p. 5238 – 5246;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

156-81-0, As we all know, there are many different methods for the synthesis of a compound, and people can choose the synthesis method that suits their own laboratory according to the actual situation. 156-81-0, name is Pyrimidine-2,4-diamine, molecular formula is C4H6N4, The compound is widely used in many fields, so it is necessary to find a new synthetic route. The downstream synthesis method of this compound is introduced below.

Synthesi -bromopyrimidine-2,4-diamine[00103] To a solution of 2,4-diaminopyrimidine (1.0 g, 9.1 mmol) in chloroform (30 mL) was added N-bromosuccinimide (1.62 g, 9.08 mmol). The solution was stirred in the dark for 12 hours, at which time it was added to CH2C12 (150 mL) and IN NaOH (50 mL). The solid that formed was filtered, rinsed with water and concentrated in vacuo, yielding 1.4 g (74%) of 5-bromopyrimidine-2,4-diamine. LCMS (m/z): 189/191 (MH ). ? NMR (DMSO-^): 5 7.78 (s, 1H), 6.58 (bs, 2H), 6.08 (bs, 2H).

In the field of chemistry, the synthetic routes of compounds are constantly being developed and updated. I will also mention this compound in other articles. 156-81-0, Pyrimidine-2,4-diamine, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; DANA-FARBER CANCER INSTITUTE, INC.; ZHAO, Jean J.; WANG, Qi; WO2012/109423; (2012); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

113583-35-0, As we all know, there are many different methods for the synthesis of a compound, and people can choose the synthesis method that suits their own laboratory according to the actual situation. 113583-35-0, name is 2-Methanesulfonyl-4,6-dimethoxypyrimidine, molecular formula is C7H10N2O4S, The compound is widely used in many fields, so it is necessary to find a new synthetic route. The downstream synthesis method of this compound is introduced below.

EXAMPLE 8 Preparation of Methyl 5-(4,6-Dimethoxypyrimidin-2-yl)oxy-2-ethoxy-2,3-dihydrobenzofuran-4-carboxylate (Compound No. 507) A mixture comprising 1.0 g of methyl 2-ethoxy-5-hydroxy-2,3-dihydrobenzofuran-4-carboxylate, 1.0 g of 4,6-dimethoxy-2-methylsulfonylpyrimidine and 0.78 g of potassium carbonate in 30 ml of N,N-dimethylformamide, was heated and stirred at 100 C. for two hours. The mixture was returned to room temperature, then poured into water and extracted with ethyl acetate. The organic layer was washed with water and then dried over anhydrous sodium sulfate. It was concentrated under reduced pressure, and the oily substance thereby obtained was purified by silica gel column chromatography (n-hexane/ethyl acetate=4/1) to obtain 1.5 g (yield: 95%) of the desired compound.

In the field of chemistry, the synthetic routes of compounds are constantly being developed and updated. I will also mention this compound in other articles. 113583-35-0, 2-Methanesulfonyl-4,6-dimethoxypyrimidine, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; Kumiai Chemical Industry Co., Ltd.; Ihara Chemical Industry Co., Ltd.; US5616537; (1997); A;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

932-52-5, Each compound has different characteristics, and only by selecting the characteristics of the compound suitable for a specific situation can the compound be applied on a large scale. 932-52-5, name is 5-Aminopyrimidine-2,4(1H,3H)-dione. This compound has unique chemical properties. The synthetic route is as follows.

A mixture of aromatic aldehydes 1 (1 mmol), dimedone (2, 1 mmol), 5-aminouracil (3, 1 mmol), and CuI NPs (2.9 mg, 15 mol%) was stirred at room temperature in water (10 mL) for the appropriate times. After completion of the reaction (TLC), the reaction mixture filtered and the solid mass was then diluted with DMF (5 mL), and the mixture was centrifuged at 2000-3000 rpm for 5 min to recover the catalyst and then the catalyst was dried in a vacuum oven at 100 C for several hours. The organic solution was the npoured into cold water (15 mL) and filtered. The resulting solid was recrystallized from EtOH to afford the pure product 4.

While traditionally a conservative industry, chemical producers will need to modernize their PR strategies to stay relevant.we look forward to future research findings about 932-52-5, 5-Aminopyrimidine-2,4(1H,3H)-dione.

Reference:
Article; Abdolmohammadi, Shahrzad; Aghaei-Meybodi, Zahra; Combinatorial Chemistry and High Throughput Screening; vol. 18; 9; (2015); p. 911 – 916;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

130049-82-0, The major producers of chemicals have been the Europe, Japan and China. Due to the growing call for a cleaner, greener environment, people will have to find innovative ways to maintain their relevance. Here is a compound 130049-82-0, name is 3-(2-Chloroethyl)-6,7,8,9-tetrahydro-9-hydroxy-2-methyl-4H-pyrido[1,2-a]pyrimidine-4-one. This compound has unique chemical properties. The synthetic route is as follows.

In a flask there were mixed 1.00 g (3.89 mmole) of 6-fluoro-3-(4-piperidinyl)-l,2- benzisoxazole hydrochloride and 0.95 g (3.89 mmole) of 3-(2-chloroethyl)-9- hydroxy-2-methyl-6,7,8,9-tetrahydro-4H-rhoyrido[l,2-a]rhoyrimidin-4-one, 0.83 g (7.79 mmole) of sodium carbonate and 10 ml of ionic solvent l-ethyl-3-methyl-imidazolium ethylsulfate. The suspension was heated to 80 0C or 90 0C and left stirring at this temperature overnight. HPLC showed that the conversion was 88%.It was cooled to room temperature and co-solvent (water and dichloromethane, acetone, ethanol, methanol, water) was added for precipitation of the product, it was filtered and rinsed with this solvent, well sucked off.

While traditionally a conservative industry, chemical producers will need to modernize their PR strategies to stay relevant.we look forward to future research findings about 130049-82-0, 3-(2-Chloroethyl)-6,7,8,9-tetrahydro-9-hydroxy-2-methyl-4H-pyrido[1,2-a]pyrimidine-4-one.

Reference:
Patent; KRKA, D.D., NOVO MESTO; RUZIC, Milo?; PRUDIC, Darja; PECAVAR, Anica; SMRKOLJ, Matej; WO2010/14047; (2010); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

90213-66-4 , The common heterocyclic compound, 90213-66-4, name is 2,4-Dichloro-7H-pyrrolo[2,3-d]pyrimidine, molecular formula is C6H3Cl2N3, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc., below Introduce a new synthetic route.

In the ice bath conditions,A solution of 2,4-dichloro-7H-pyrrole [2,3-d] pyrimidine 1.0 gWas dissolved in 50 mL of dichloromethane,To the above mixed solution, 1.06 g of p-toluenesulfonyl chloride was added slowly,Triethylamine 1.08 g,N, N-dimethylpyridin-4-amine, 0.019 g,The mixed solution was stirred at room temperature for 5 h,After the reaction is complete,To the above solution was poured into 150 mL, the organic phase was washed with water,Citric acid aqueous solution and brine solution were washed three times each. The organic phase was dried with anhydrous magnesium sulfate overnight, and the solvent was evaporated under reduced pressure to obtain crude product.Recrystallization from petroleum ether gave 1.6 g of pure white product.Yield 89%.

The synthetic route of 90213-66-4 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Shandong University; Zhang, Yingjie; Xu, Wenfang; Liang, Xuewu; (18 pag.)CN106349224; (2017); A;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia